Mining machine



M. P. HOLMES MINING MACHINE Dec. 24, 1929.

Filed June 18, 1923 3 Sheets-Sheet Dec. 24, 1929.

M. P. HOLMES MINING MACHINE Filed June 18, 1923 3 Sheets-Sheet Ei g- 4 -45 zmzmmfl /1 Dec. 24, 1929. M. P. HOLMES 1,741,131

MINING MACHINE Filed June 18, 1923 3 Sheets-Sheet 3 III/02 r1 5; I j v q Zy Patented Dec. 24, 1929 stares rarest entice.

MORRIS P. HOLMES, OF CLAREMOEJT, NEXV I-IAIIPSHIRE, ASSIGNOE TO SULLIVAN MAUI- IN COMPANY, A CORPORATEON OF MASSACHUSETTS IIIINING MACHINE Application filed June 18,

iiy invention relates to mining apparatus. An object of my invention is to provide an improved mining apparatus and more particularly an improved mining apparatus of the flexibly fed type adapted to cut on the mine bottom. Further objects of my lnvention include the provision of improved feed and feed controlling mechanism, an improved arrangement and disposition of parts whereby the machine may be converted to cut in either direction with facility, improved guiding means for the flexible feeding member during the cutting operation, and improved truck and reel driving mechanisms. These 5 and other objects and advantages of my invention will hereinafter more fully appear. in the accompanying drawings I have shown for purposes of illustration one embodiment which my invention may assume in 20 practice.

In these drawings,-

Fig. 1 is a side elevation of a mining machine monnted on its truck in position for transport.

Fig. 2 is a side elevation, partially brolren away, of the opposite side of the machine shown in Fig. 1, the machine being removed from the truck.

Fig. 3 is plan view, partially in section,

he machine. if. l is a side elevation, similar to Fig. 2,

partiallyshown in central longitudinal section.

5 is a detail sectional view taken substantially on line 55 of F 2.

i ig. 6 is a transverse sectional view taken .ntially on line 6-6 of Fig. 4.

T is a diagrammatic view showing the nachine in operation in a room.

In the illustrative construction I have shown a mining machine of the room and pillar type comprising a machine frame or a casing 1 slidable on its bottom 2 on a mine bottom and relative to a flexible feeding means adapted to provide advance and receding flexible feeding portions, herein in the form of a continuous flexible member or chain 3, this casing herein carrying cutting mechanism including a cutter bar 4 rigidly secured within said frame and provided with 1923. Serial N0. 648,007.

the usual endless cutter bit carrying cutter chain 5. As usual in this type of machine, the feeding means and the cutter chain are also driven from a suitable motor 6 (indicated in dotted lines), the feeding mechanism herein being driven through driving connections hereinafter described and connected respectively to feed operating and controlling members 7 and 8 each disposed on a .he rear of the machine frame, while the cutting mechanism is driven through a cutter chain driving sprocket 9 rotatable on a vertical axis beneath the rear end of the machine.

In describing my improved construction I will first describe the cutter chain driving mec ianism. Here it will be noted that the rear end of the armature shaft of the motor 6 is provided with a bevel pinion 10 which in turn meshes with a bevel gear 11 journaled on a bearing 12 about a vertically disposed stud 13 on the rear end of the machine frame. The gear 11 is in turn connected, as by bolt and nut connections 14, to a sleeve carrying a pinion 15 which meshes with a plurality, herein three (see Fig. 6), of planetary gears 16, journaled in suitable hearings on a spider 17. These planetary gears in turn mesh with an internal gear 18 attached, as by screws 19, to the cutter chain sprocket 9 and which with the sprocket is journaled in bearings 20, herein located between bearings 21, so as to rotate relative to the spider and the lower end of the stud. As shown, the spider 17 is also provided with an upstanding sleeve 22 journaled on the stud inside of the sleeve carrying the pinion 15, and suitable bearing sleeves 23 and 24 are also provided on the opposite side of the sleeve 22 while the bearings are enclosed in sleeves 25 and 26. A flanged ring 27 is also interposed between the lower bearing 20 and the bearing 21, while a retaining member 28, attached to the bot tom plate by screws 29 and to a reduced portion 30 on the stud by a screw 31, is provided p to hold the parts in assembled relation. The gear 18 also is provided with a friction sur face 32 on its outer periphery with which cooperates a brake band 33, the band 33 being held stationary, herein by a pin and slot orizontal axis and projecting laterally from 7 CJI connection 34, on the machine frame and having its ends pivotally connected at 35 and 36 to members 37 and 38 threadedly secured to a transverse rod 39 suitably journalcd in the machine frame and provided with an operating handwheel 40. Thus, when the rod 39 is rotated in one direction the threaded portions on the shaft draw in the ends of the brake band causing friction to be applied to the surface 32 and braking the gear 18, while rotation in the opposite direction releases the brake.

Cooperating with the mechanism just de scribed is the feeding mechanism. This mechanism is herein connected to and driven by the sleeve 22 on the spider 17, the same being connected by a semi-permanent clutch 41 to a sleeve 42 having a worm 43 formed thereon, and the sleeve 42 in turn being journaled on a flanged bearing sleeve 44, the bearing 12, and a boa 'ing 45 removable through the top of the machine frame upon removal of a cap 46. This Worm 43 in turn meshes with a worm gear 47 disposed on a transverse axis, herein, as preferably, coaxial with the members 7 and 8. As shown. this worm gear 47 rotates with a casing 48 of a differential, herein comprising a series of beveled pinions 49, herein three, carried on a spider 50 and meshing with oppositely disposed bevel gears 51 and 52 rotatable on a transverse feed driving shaft 53. As shown, the gears 49 are suitably journaled on the spider studs, the spider being keyed tothe shaft 53 as at 54, and the gears 51 and 52 are carried on sleeves 55 and 56, suitably journal'ed in bearings disposed between the same and the differential casing. As shown herein, the sleeve 55 is keyed, as at 57, to a hub of a friction drum 58. the rotation of which is controlled by a suitable brake band 59 through controlling mechanism, hereinafter described, operated by a lever 60 car ied on the advancing side of the machine frame. This lever 60 is provided with a handle 61 threaded to a clamping member 62 which frictionally engages an arcuate member 63 suitably secured to the machine frame, thereby holding the lever in any desired adjusted position. The sleeve 55 is also connected through a semi-permanent clutch 64 with a sleeve 65 on the feed operating member 7, which is in turn suitably connected to a reduced portion 66 on that end of the shaft 53 by a screw and washer connection 67, the sleeve 65 also being ournaled in a removable ball bearing carried by one side of the machine frame. Also it will be noted that the sleeve 56 is keyed, as at 68, to the hub of a frictiondrum 69 controlled by a brake band 70. This brake band is held stationary on the machine frame as at 71, and is pivotally connected through toggle links 7 2 and 7 3 to a crank 74 suitably secured to a transverse shaft 7 5 provided with an operating lever 7 6, similar to the lever 60. A similar toggle mechanism (not shown) controls the brake band 59. The sleeve 56 is also herein con-- nected through a semi-permanent clutch W with a sleeve 7 8 of the member 8, similarly connected to the opposite reduced end of the shaft 53 while the sleeve is similarly journaled on the machine frame.

Cooperating with the feeding mechanism and engaging the feed operating member 7 and the member 8 is the flexible feeding means herein in the form of the chain 3. Herein the machine is shown as adapted to cut from right to left and in this disposition of parts (Figs. 1, 2 and 3) it will be noted that the advancing portion of the chain 3 extends from the top of the feed sprocket 7, down beneath an idler sprocket 79, forward toward the front end of the machine, and then around an idler 8O laterally along the face to the left hand rib of the room, while the receding portion extends down beneath an idler 81, herein coaxial with the rod 39, then upwardly toward the top of the machine, then transversely across the latter in a chain guiding channel 82 formed in the machine casing,

forwardly over and about the member 8 when the machine is being sumped and downwardly beneath the idler 81 and then upwardly about the member 8 when the machine is cutting across the face, the chain in either case then passing around a guide 83 and guides 84 and 85, rotatable on upstanding axes on the rear end of the machine frame, and laterally and longitudinally during sumping or simply laterally during lateral cutting. Obviously,

by reversing the arrangement of the idler sheaves, the hand wheel 40, the controlling levers 60, 7 6 and the feed chain 3, and, if desired, transposing the feed operating and con trolling members, as indicated in dotted lines in Fig. 3, the machine may cut from left to right.

It will also be understood that the machine is adapted to be transported on a truck (see Fig. 1), generally designated 86, which is provided with a usual cable reel 87 on its rear end, herein driven through a chain connection 88 with the truck wheels, while the latter are driven through truck driving and controlling mechanism, herein including a sprocket 89 formed on the member 8 and controlled by the controlling mechanism therefor previously described, the sprocket 88 being operatively connected ,to the truck wheels through a chain 90 herein as preferably connected to the front axle of the truck which is in turn connected to the rear axle, driving the reel, through a chain 91. Attention is here also directed to the fact that the chain 90 may be connected if desired between member 8 and the truck wheels in either posi tion of the former, as indicated in dotted lines in Fig. 3, the idler 7 9 being removed whenever necessary. Herein, it will be noted that the drive chain 90 is so connected that the truck may be driven backward from the room without reversing the driving motor as soon as the machine is loaded on the truck. Of course it will also be understood that if it is desired to move forwardly after emerging from the room, the motor may be reversed by any usual means (not shown) and thus reverse the feed operating and controlling members, one of which carries the truck driving sprocket.

In the operation of my improved construction the machine is preferably, when unloaded from its wheeled truck 86, brought up to the face to the position indicated in full lines in Fig. 6 preparatory to sumping. The advancing portion of the flexible member 3 is then connected to the lef hand rib to an anchor jack A, while the receding portion is connected to the right hand rib as at B, the chain then being disposed downwardly from the channel 82 forwardly over the member 8 and then rearwardly beneath the roll 83 and around the guiderolls 84 and 85 at this time.

The brake band 33, under control of handwheel40, is then applied tending to hold the internal gear 18 from rotating and rotating the sprocket 9 until the cutter chain 5 is resisted by the coal, the feeding memoer 7 an: the member 8 being caused to be rotated dur ing this operation. Then through suitable manipulation of the levers 60, 76, controlling the brake bands 59, 70, the cutter bar is sumped in under the face of the coal as indicated in dotted lines at the right of Fig. 6, the brake band 33 being released as the cutter chain is resisted by the coal and the member 8 accordingly drawing in the chain 3 while the feed operating member 7 is held stationary by the band 59, the machine swinging about the jack A as a pivot. The feeding mechanism reacts back through the driving mech anism to the cutter chain 5, which is resisted by the cutting encountered. It will also be noted that the machine may be moved longi tudinally to sump the cutter bar beneath the coal by extending the receding portion of the feed chain from the channel 82 forward about the member 8 and then downwardly and rearwardly about the guide roll 81 and then forward to a suitable anchor located adjacent the coal face atthe right hand rib so that upon rotation of the member 8 this portionof the feed chain is drawn in. It will further be noted that if desired the receding portion of the feed chain may be extended downward from the channel 82 beneath the guide roll 81 then upward about the member 8 and forward to an anchor located adjacent the coal face so that when this portion of the feed chain is drawn in the machine is moved forward to effect its sumping cut. When in this position and after the chain engaging the member 8 has been rearranged, the chain passing at this time downwardly from the channel 82 beneath the guide roll 81 then upwardly about the member 8 and rearwardly beneath the roll 83 and around rolls 8% and 85 to the jack B, the machine may be straightened up by slacking up on the band or loading the band 59, and then cut transversely across the face, as indicated by the next dotted line posi tion at the left of Fig. 6, the band 59 then being released. When the machine reaches the left hand rib of the room, it may be inclined relative to the rib, as shown by the last dotted line position, and backed out by means of the advancing portion of the chain by suitable manipulation of brake bands 59 and 70. and returned to the truck at a high or haulage speed likewise under control of the brake bands 59 and 70, one of the brake bands then being loaded. In the operation of my improved mechanism, it will be noted that by means of the brake band 33 the cutter chain sprocket 9 may be rotated or caused to remain idle while the motor is running, and that the speed of this sprocket may be controlled by the amount of application of the brake bands 59 and 70, the cutter chain being coordinated with the feeding mechanism. The transport truck 86 which may be driven by either the feed operating and controlling members 7 and 8, herein the member 8, through the chain connection 90, may also have its speed controlled by the brake bands 59 and 70, the cutter chain being held stationary at this time by means of the brake band 33, so that any desired truck speed, including a relatively high speed, may be obtained.

lVhile I have in this application specifically described one embodiment which my invention may assume in practice, it will be understood thatthis form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

hat I claim as new and desire to secure by Letters Patent is:

1. In a mining machine, a motor, and feeding mechanism driven thereby to move said machine bodily during cutting including a feed operating member and a flexible feeding member cooperating therewith and having a portion constantly lying on the top of said machine frame.

2. In a mining machine, a motor, and feeding mechanism driven thereby including relatively rotatable feed operating and controllin members, and a flexible feeding member cooperating directly therewith and having its intermediate portion constantly lying on the top of said machine.

3. In a mining machine, a motor, feeding mechanism driven thereby including relatively rotatable feed operating and controlling members projecting from the sides of said machine and a continuous flexible member cooperating directly with said members, and means on the top of said machine supporting an intermediate portion of said flexible member for lateral movement.

4. In a mining machine, a motor, feeding mechanism driven thereby including relatively rotatable feed operating and controlling members and a continuous flexible member cooperating directly therewith, means for guiding said flexible member laterally away from said machine, and means on the top of said machine supporting an intermediate portion of said flexible member for lateral movement.

5. In a mining machine, a motor, feeding mechanism driven thereby including relatively rotatable feed operating and controlling members and a flexible member cooperating directly therewith, and means on said machine for guiding said flexible member in cluding a guiding channel in which said flexible member is loosely guided.

6. In a mining machine, a motor, feeding mechanism driven thereby including relatively rotatable feed operating and controlling members and a flexible member cooperating directly therewith, and means for guiding said flexible member disposed between said feed and controlling members and ineluding a transverse guiding channel.

7. In a mining machine, a motor, feeding mechanism driven thereby including a feed operating member, a flexible member cooperating therewith, and means for guiding said flexible member including a transversely disposed guiding channel on the machine.

8. In a mining machine, a motor, feedlng mechanism driven thereby including relatively rotatable feed operating and controlling members and a flexible member cooperating directly therewith and extending therebetween,and means to guide said flexible member including a guiding channel on the top of the machine.

9. In a mining machine, a machine frame, a motor carried thereby, feeding mechanism driven by said motor including relatively rotatable feed operating and controlling members each rotatable on a transverse axis, a flexible member cooperating directly therewith and extending therebetween, and means forming a transverse guiding channel for' said flexible member extending between said feed operating and controlling members;

10. In a mining machine, a motor, feeding mechanism driven thereby including relatively rotatable feed operating and controlling members and a flexible member cooperating directly therewith and extending therebetween, and means to guide said flexible member including guiding members adjacent each of said feed operating and controlling members and a guiding channel therebetween.

11. In combination with a mining machine, of a transport truck therefor, machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, a differential driving mech anism for said members, and means to drive said truck from one of said members and through said differential at variable speeds.

12. In combination with a mining machine, of a transport truck therefor, machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, a differential driving mechanism for said members, and means to drive said truck at variable speeds from either of said members.

13. In combination with a mining machine, a transport truck therefor, machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, means permitting transposition of sail members, a diflerential driving mechanism for said member, and means to drive said truck from one of said members.

14;. A mining machine having cutting mechanism, feeding mechanism therefor including a differential gearing, a feed chain, relatively rotatable feed operating and controlling members operatively connected directly with said chain, and means whereby the latter is adapted to cooperate with said controlling member while said machine is being laterally fed, said latter means permitting rearrangement of said flexible means with respect thereto to rovide a reverse co operation with said controlling member to permit a sumping cut to be made, and means for holding said feed 0 aerating member dur ing sumping.

15. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mineand to supply the power for such transportatioma motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding,'driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor whereby said feed operating member is driven at variable speeds in the same direction. and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

16. In a bottom cutting mining machine of the type. adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a'feed operating member rotatable on a horizontal axis adapted to coo erate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor whereby said feed operating member is driven at variable speeds in the same direction, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

17. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor whereby said feed operating member is driven at variable speeds in the same direction, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

18. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a friction device coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

19. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controllin mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a speed controlling friction device coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

20. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, a plurality of friction devices coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

21. In a bottom cutting mining machine of the type adapted to be supported upon a truck for ransport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member be tween the la ter and said motor to which power is supplied by said motor, a plurality of speed controlling friction devices coaxial with said feed operating member, and a truck driving element integral with said feed oper ating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

22. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation. a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is sup plied by said motor whereby said feed operating member is driven at variable speeds in the same direction, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

23. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a friction device coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

24. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member rotatable on a hori- -zontal axis adapted to cooperate directly and controlled by the driving and controlling mechanism for said feed operating member.

25. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a plurality of friction devices coaxial withsaid feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

26. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about amine and to supply the power for such transportation, a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a plurality of speed controlling friction devices coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

27. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a worm wheel coaxial with said feed operating member, and a truck driving element rotatable at the same angular speeds as said feed operating member 00- axial with the latter and driven and 'controlled by the driving and controlling mechanism for said feed operating member.

28. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a worm wheel coaxial with said feed operating member, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

29. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a worm wheel coaxial with said feed operating member, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

30. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a worm wheel coaxial with said feed operating member and a vertically disposed worm engaging said worm wheel, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and cont-rolling mechanism for said feed operating member.

31. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member rotatable on a horizontal axis adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied cally disposed worm engaging said worm wheel, and a truck driving element rotatable at the same angular speeds as said feed oper 'ating member coaxial with the latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

32. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to sup ply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member be tween the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a worm wheel coaxial wits said feed operating member and a. vertically disposed worm engaging said worm wheel, and a truck driving element integral with said feed operating member and driven and controlled by the driving and controlling mechanism for said feed operating member.

38. In a bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feedin element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and con trolling mechanism comprising a friction device coaxial with said feed operating member, and said driving and controlling mechanism also comprising a worm wheel coaxial with said feed operatin member, and a truck dri ing element rotatable at the same angular speeds said feed operating member coaxial with the latter and driven and con trolled by the driving and controlling mechanism for said feed operating member.

3%. In a bottom cuttin mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a speed controlling friction device coaxial with said feed operating member, and said driving and controlling mechanism also comprising a worm wheel coaxial with said feed operating member, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with he latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

35. In bottom cutting mining machine of the type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, a feed operating member adapted to cooperate directly with a flexible feeding element during machine feeding, driving and controlling mechanism for said member between the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a plurality of friction devices coaxial with said feed operating member, d said driving and controlling mechanism also comprising a worm wheel co-axial with said feed operating member, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and controlling mechanism for said feed operating member.

In a bottom cutting mining machine of the type adapted to be supported upon a truck for ransport about a mine and to supi the 1 ower for such transportation, :1 motor, a feed operating member adapted to cooperate directly with a nexible fee-ding element curing machine feeding, driving and controlling mec ianism for said member be tween the latter and said motor to which power is supplied by said motor, said driving and controlling mechanism comprising a plurality of speed controlling friction devices coaxial with said feed operating member, and said driving and controlling mechanism also comprising a worm wheel coaxial with said feed operating member, and a truck driving element rotatable at the same angular speeds as said feed operating member coaxial with the latter and driven and controlled by the driving and controlling mechanism or said feed 0 aerating member.

37. In a bottom cutting mining machine of type adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding elements during machine feeding. driving and controlling mechanism for said members between the latter and said motor to which power is supplied by said motor, and a truck driving element rotatable at the same angular speeds as one of said members coaxial with the lat ter and driven and cont-rolled by the driving and controlling mechanism for said member.

38. In combination with a mining machine having a motor, a transport truck therefor, a feeding mechanism for said machine driven by said motor including a diderential and relatively rotatable feed operating and controlling members driven through said difierential and each adapted to cooperate directly with flexible feeding means, and means for driving said truck from said motor including operative driving connections between one of said members and the truck Wheels.

39. In a mining machine, a motor and feed ing mechanism driven thereby including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feedingmeans, frictional controlling means for each of said members including a bralze drum, a brake band cooperating therewith, and controlling means for said brake bands comprising lever operated toggle mechanisms.

40. In a mining machine, a motor and feeding mechanism driven thereby including relatively rotatable feed operating and con trolling members each adapted to cooperate directly with flexible feeding means, frictional controlling means for each of said members including a brake drum, a brake band cooperating therewith, and controlling means for said brake bands comprising lever operated toggle mechanisms both operable from the advancing side of the machine.

41. In a mining machine, a motor and feeding mechanism driven thereby including relatively rotatable feed operating and controlling members each adapted to cooperate directly With flexible feeding means, a differential through which said members are driven, and controlling means for said differential including brake drums connected to different elements thereof, brake bands cooperating with said drums, and controlling means for said brake bands comprising lever operated toggle mechanisms.

42. In a bottom cutting mining machine of the type which is slidable on the mine bottom during cutting and adapted to be supported upon a truck for transport about a mine and to supply the power for such transportation, a motor, cutting mechanism driven thereby including a variable speed reaction mechanism, feeding mechanism for efiecting feeding movement of the machine at a cutting speed directly upon the mine bottom driven through said variable speed reaction mechanism including a difierential, and truck driving means including a truck driving element driven through said feeding mechanism.

In testimony whereof I aii'ix my signature.

MORRIS P. HOLMES. 

